Costa Marques: Fortress History and River Landscapes

Costa Marques is a destination for a range of interests: nearby are Forte Príncipe da Beira and Praia do Curralinho; the wider Guaporé area brings seasonal river landscapes and sport fishing into the picture. This places fortress history, an annual festival, and nature-related themes side by side as distinct travel highlights. If you are looking for a vacation rental, you can start by considering which of these themes you would most like to shape your trip.

Fortress History on the Guaporé

Forte Príncipe da Beira lies nearby, on the banks of the Rio Guaporé. The fortress is located in the municipality of Costa Marques on the border with Bolivia and has been considered a national historic heritage site since 1937. With a perimeter of more than 900 meters, it is one of the largest examples of Portuguese military engineering in colonial Brazil. The government of the state of Rondônia describes the Forte as the most significant structure of the Portuguese Empire outside Portugal. These assessments reflect two different measures: the structure's dimensions convey its scale, while its historical recognition underscores its significance in colonial Brazil. For travelers interested in history, the Forte offers a clear thematic focus.

A 2025 report describes the RO-478 as the main access road between the urban center of Costa Marques and Forte Príncipe da Beira. If this route is important to your plans, check current road conditions before setting out.

River Landscapes in the Wider Vale do Guaporé

In the wider Vale do Guaporé, the Rio Guaporé is considered a destination for sport fishing. During the dry season, bays and backwater areas are home to many tucunarés. For anglers, both the time of year and the shape of the waterways are relevant factors. The beaches are also connected to the river's flow: as the water level drops, several beaches emerge in the wider Guaporé region. This presents two distinct seasonal perspectives side by side—sport fishing during the dry season and beaches that emerge as water levels fall. For nature lovers, changes in water levels also become a defining theme.

Festival at Praia do Curralinho

The Festival de Praia takes place annually at Praia do Curralinho, bringing together residents of Costa Marques and tourists. The festival adds a recurring cultural highlight to the area's fortress history. For the 17th edition in 2016, men's and women's beach volleyball and footvolley competitions were planned. The festival takes place annually; the competitions mentioned were planned for the 2016 edition. This distinguishes the recurring event from a specific historical program.

Choose Your Travel Focus When Looking for Accommodation

When looking for a vacation rental, it helps to choose a clear focus: would you like fortress history to be the main attraction, or are you more interested in river landscapes, sport fishing, and the festival? This decision helps align the rest of your travel plans with the themes you actually want to explore.

Discover more destinations: Porto Velho, Vilhena, Rolim De Moura, Guajará-Mirim, Barranco Alto, Ji-Paraná, Cacoal, Cabixi.

Back to the regional travel guide: Rondônia.